I would love to see some of these converted into textbooks with a test format and useable files. I am already using Head First Java in the classroom and will be using Head First HTML with CSS & XHTML this spring. My students purchase their own copies as they school has yet to approve it as a textbook. The topics of Algebra and Calculus is great, but do a whole math series: Geometry, Trig and maybe even Consumer Economics (yes even geeks need to learn life skills).

I'm a huge fan of many of your books, but I am still a bit dumb-founded as to why you guys haven't jumped on the .NET Framework bandwagon. I've been developing .NET applications since 2002 and I still haven't seen anything from you in your Head series. Are you guys aware of how powerful this framework is and is here to stay? Bill Gate made one of the most audacious statements in the history of business in 2001 and it went something like this: "I am so confident in .NET and the future of it, that I bet the company on it!". Don't you know Java is dead and how many companies and supporters of it are abandoning ship at an alarming rate?

Please notify me if anything is down the pipeline because I can't wait! Maybe a rewrite of your Java or OO books in .NET would be very nice!

I think with the current trend in computing (more cores - CPU), functional languages are gaining acceptance (and in .NET even being incorporated into the ecosystem – C# 3.0 with Linq, F#), there should be a Head First Functional Programming/F#/C#3-Linq (some of it).

I've been a .NET developer for almost as long as its been in the frame. The fact that the HF books I've read so far have all been JAVA centric doesn't matter. If anything its kind of refreshing and occationally thought provoking. What I'd love to see more books about would be approaches to real world system integration and connectivity. With SOA gaining popularity in the business/enterprise world a Head First or maybe Head Rush on this subject would be great. Too many of the books I've tried to read on this topic are way too stuffy and never seem to get to the point. I'm sure HF could do a better job.

php.. yes go ahead and laugh, but HF is amazing and I am loving HFC#... so HFPHP would be awesome!

Also, a HF book on xna game development. The reason I'm interested in finishing this C# book (HF) is so I can program space invaders and the ghost game... I'm very interested in learning game programming, and I can see how perfect a HF book would be for XNA game development... so c'mon... let's get going Any book I pick up regarding game programming.. they're just so long and boring... :X I had fun with allegro but am thinking of learning XNA next...

Head first LINUX would be a most useful volume. This OS is gaining popularity for its speed and reliability. In fact, I see no reason to run 'doze unless you are a hard-core gamer or if you are running some app that is 'doze only.

First of all, I would like to thank you guys for producing Head First C#, it's truly a work of art. I just started reading it. I would love to see a Head First C# Game Programming [XNA & Direct3D] book. Something to build up on the games introduced in HF C#.

There are already lots of excellent Java books. Head First Java is the best among them. And there is also Head First Servlets & JSP. But why isn't there a Head First JSF/MyFaces book? I found JSF technology very convenient and efficient in developing web applications, especially using MyFaces (Trinidad) extension. So I really hope there will be a Head First JSF book coming soon.

Head first LINUX would be a most useful volume. This OS is gaining popularity for its speed and reliability. In fact, I see no reason to run 'doze unless you are a hard-core gamer or if you are running some app that is 'doze only.

I totally agree on that. I'm waiting for this title to come up.
And I can't hardly wait to get my hands on Head First Physics.

I loved Head First C# and Head First Java. It took me about 3 weeks to learn them both. Three weeks!! for crying out loud. My teammates we're stunned when I started correcting their code on our project.

Still, in the near future I am hoping to see a title like Head First Math Vol. 1 . Really, I would love to see a collection of Head First Math books that covers that subject. Maybe even math applied programming. I would die to read a Head First Math book. And I am drooling after the Physics book

Later edit : Oh, and I was thinking about a Head First Assembler book and HF C/C++. I know, they're old school. But many programmers today write code that is either slow or that use incredible amounts of memory because they always take shortcuts. For efficiency you have to think at a basic level.